Jvc KDLX 50 R Service Manual

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KD-LX50R KD-LX50R

SERVICE MANUAL

CD RECEIVER

KD- LX5OR

Area Suffix

I E Continental Europe

nn -'H

l@l

/ 81215! /
n.s.%¢.u.u
Contents
Safety precaution ---------------------- Flow of functional operation
Preventing static electricity until TOC read ------------------------ 2-18
Instructions --------------------- Description of major iCs -------------- 22o
Disassembly method ------------------- 2-1 Block diagram -------------------------- 2-
Maintenance of laser pickup ----------- 2-1 2 Standard schematic diagrams ------- 2-
Extention cord connectiong method -- 2-1 3 Printed Circuit boards ------------------- 2-
Functions of the mechanism under Parts list ---------------------------------- 3-1 ~19
the service mode ---------------------- 2-16
VICTOR COMPANY OF JAPAN, LIMITED

MOBILE ELECTRONICS DIVISION
PERSONAL & MOBlLE NETWORK B.U. t077,1Chomephwatarrmachi,Maebashrcitydapan

,9de in Japan This service manual is printed on 100% recycled paper. N0_49562
200005(O) COPYRIGHT CC) 2000 VICTOR COMPANY OF JAPAN, LTD. May 2000

+

(No.49562)

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Preventing static electricity

1.Grounding to prevent damage by static electricity
Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged,
can destroy the laser diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs.

2.About the earth processing for the destruction prevention by static electricity
Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as CD players.
Be careful to use proper grounding in the area where repairs are being performed.

2-1 Ground the workbench
Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate over
it before placing the traverse unit (optical pickup) on it.

2-2 Ground yourself
Use an anti-static wrist strap to release any static electricity built up in your body.

(caption)
Anti-static wrist strap

IMO

Conductive material
(conductive sheet) or iron plate

3. Handling the optical pickup

1. In order to maintain quality during transport and before installation, both sides of the laser diode on the
replacement optical pickup are shorted. After replacement, return the shorted parts to their original condition.
(Refer to the text.)

2. Do not use a tester to check the condition of the laser diode in the optical pickup. The tester's internal power
source can easily destroy the laser diode.

4.Handling the traverse unit (optical pickup)
1. Do not subject the traverse unit (optical pickup) to strong shocks, as it is a sensitive, complex unit.

2. Cut off the shorted part of the flexible cable using nippers, etc. after replacing the optical pickup. For specific
details, refer to the replacement procedure in the text. Remove the anti-static pin when replacing the traverse
unit. Be careful not to take too long a time when attaching it to the connector.

3. Handle the flexible cable carefully as it may break when subjected to strong force.

4. It is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it
Damper bracket
co mechanism assy

Attention when traverse unit is decomposed

*Please refer to "Disassembly method" in the text for pick-up and how to
detach the substrate.

1.Solder is put up before the card wire is removed from connector on
the CD substrate as shown in Figure.
(When the wire is removed without putting up solder, the CD pickup
assembly might destroy.)

2.P|ease remove solder after connecting the card wire with
when you install picking up in the substrate.

FD gear Ptckup mm